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Investigating the properties of a galaxy group at z = 0.6

Published online by Cambridge University Press:  29 March 2021

Daniela Hiromi Okido Open the ORCID record for Daniela Hiromi Okido [Opens in a new window] ,
Cristina Furlanetto ,
Marina Trevisan  and
Mônica Tergolina Open the ORCID record for Mônica Tergolina [Opens in a new window]
Daniela Hiromi Okido
Affiliation:
Universidade Federal do Rio Grande do Sul, Instituto de Física Av. Bento Gonçalves, 9500, 91501-970, Porto Alegre, Brazil email: hiromi.okido@ufrgs.br
Cristina Furlanetto
Affiliation:
Universidade Federal do Rio Grande do Sul, Instituto de Física Av. Bento Gonçalves, 9500, 91501-970, Porto Alegre, Brazil email: hiromi.okido@ufrgs.br
Marina Trevisan
Affiliation:
Universidade Federal do Rio Grande do Sul, Instituto de Física Av. Bento Gonçalves, 9500, 91501-970, Porto Alegre, Brazil email: hiromi.okido@ufrgs.br
Mônica Tergolina
Affiliation:
Universidade Federal do Rio Grande do Sul, Instituto de Física Av. Bento Gonçalves, 9500, 91501-970, Porto Alegre, Brazil email: hiromi.okido@ufrgs.br
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Abstract

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Galaxy groups offer an important perspective on how the large-scale structure of the Universe has formed and evolved, being great laboratories to study the impact of the environment on the evolution of galaxies. We aim to investigate the properties of a galaxy group that is gravitationally lensing HELMS18, a submillimeter galaxy at z = 2.39. We obtained multi-object spectroscopy data using Gemini-GMOS to investigate the stellar kinematics of the central galaxies, determine its members and obtain the mass, radius and the numerical density profile of this group. Our final goal is to build a complete description of this galaxy group. In this work we present an analysis of its two central galaxies: one is an active galaxy with z = 0.59852 ± 0.00007, while the other is a passive galaxy with z = 0.6027 ± 0.0002. Furthermore, the difference between the redshifts obtained using emission and absorption lines indicates an outflow of gas with velocity v = 278.0 ± 34.3 km/s relative to the galaxy.

Keywords

galaxies: groupsgalaxies: high-redshiftgalaxies: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S359: Galaxy Evolution and Feedback across Different Environments , March 2019 , pp. 188 - 189
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

References

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